How do you ensure that microservices are resilient to DDoS (Distributed Denial of Service) attacks?

Short answer: How do you ensure that microservices are resilient to DDoS (Distributed Denial of Service) attacks? is a common interview topic in Microservices. Give a clear definition, then one concrete example.

Real-world example (ShopNest)

If Payment is down, the Order service fails fast with a circuit breaker instead of hanging every checkout thread.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.